Bag-tying machine



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May 25,1926.,

J. H. WALD BAG TYING MACHINE Filed March 51 J 1925 3 Sheets-Sheet 1 @jwf 3 Sheets-Sheet 2 L/L/aJ/ [49540 y /dfm//W-m+ g2 May 25 1926.

J H wALD BAG TYING MACHINE Filed March '51 l d! 0oz Zwak' May 25 1926.

J. H. WALD BAG TYING MACHINE Filed March 51 I 1925 3 Sheets-SheetPatented May 25, 1926.

'UNITED STATES VJULIUS H. WALD, OF CHICAGO, ILLINOIS.

BAG-TYING MACHINE.

Application led March'l, l1925. Serial No. 19,751.

My invention relates to bag tying ma` chines.

One of the objects of my invention 1s to Y provide a machine for tyingtea bags which plan view of parts shown in reciprocating shuttle holder;

Fig. 4 is a section on the line 4 1 of Fig.3;

Fig. 5 is a plan view of part of the intermittently movable conveyorwhich carries the bags;

Fig. 6 is a section on the line 6--6 of Fig. 5;

Fig. 'i' is an end view of Fig. 5;

Fig. 8 is a plan view of the shuttle or looper;

Fig. 9 is an edge view of the looper;

Fig. 10 is an elevational view of the reciprocating needle carriage andthe rock arm for drawing up the loop;

F 1g. 11 1s a plan view showing the re-v ciprocable looper mechanismengaging the hag carrying conveyor;

Fi 12 is a view similar to Fig. 11 showingrt ie looper initiallyengaging the thread;

ig. 13 is a similar view showing the looper beginning to make the loop;and

Fig. 1-1 is asimilar view showing thc thread about to slip oil'. fromthe looper to complete the loop.

Referring to the drawings in detail, the laag tying machine showncomprises an intermittently' movable conveyor 10 provided with a seriesof bag carrying and neck gath-i ering devices 11 and a bag tyingmechanism past which the bags are carried, comprising a reciprocableneedle 12 which perforates the gathers at the neck of the bag and forcesa loop of cord therethrough during the .stationary condition of theconveyor, an intermittently reciprocable loop placing mechanism 13 whichcatches hold of the thread after it has been forced through the neck ofthe ba@r by the needle and places a loop about the neck of the bag, thisloo placing mechanism being reciprocable to rmg the axis of the shuttlein line with the neck of the bag during the'stationary condfion of theconveyor, and to move the loop placing mechanism out of the way of theconveyor after the loop has been completed to permit the furtherintermittent movement of the conveyor, means 14 for intermittentlygripping the thread being fed to the needle, and means 15 acting on thethread between this gripping means and the needle for drawing the loopup about the neck of the bag.

'Ihe intermittently movable conveyor comprises a. pair of conveyorchains 16 which are intermittently driven' at the proper time bysuitable mechanism (not shown).

Each bag carrying and neck gathering device 11 mounted on the conveyorcomprises a grooved guide member 17 4extending transversely of theconveyor chains and a pair of neck closing and gathering jaws 18reciproc'able in the transversely extending guide for squeezing the neckof the bag together and holding it during the tying operation. T heseclosing jaws are controlled'in their sliding movement by means ofsuitable cams (not shown) acting on the follower members 19.

lVhen the bag carrying device is brought opposite the bag tyingmechanism the cams l will vhave moved the closing jaws to the ,positionshown in Fig. 11, in which position the neck of the bag will be gatheredtightly in position for the needle to force a loop of threadtherethrough.

The needle 12 which forces the loop of thread through the neck of thebag is mounted on a reciprocable needle block or carriage 2() which isintermittently reciprocated by means of a sprocket wheel 21 having acrank pin 22 which engages a cam groove 23 in the side of the needlecarriage (Fig. l0). This sprocket wheel 21 is driven from the driveshaft 24 by means of a sprocket chain 25 and a sprocket 26 mounted onthe drive shaft. The cam groove 23 is so shaped as to give a quickmovement. to the needle carriage when the crank pin is travelling from27 to 28 and `from 29 to 30, the other parts of the cam groove beingarcuate so as to constitute a dwell,lcausing no movement of the needlecarriage. The thread is drawn by the bag tying mechanism froma springtension device 31 through. the intermittent gripping device 14 through aloop -32 in a light spring arm 33 and through an opening in anoscillatable rock arm 34 which acts to draw up the loop about the neckof the bag,

`as hereinafter described, through a groove 35 in the needle carriage tothe eye of the needle, which brings the thread in a position to beoperated on by the loop placing mechanism 13.

This loop placing mechanism comprises "a reciprocable looper carriage 36which is intermittently reciprocated to bring the axis of the looper orshuttle 37 into-line with the neck of the bag for the looping operationduring the stationary condition of the conveyor and is moved out of theway of the conveyor after the looping operation is performed to permitthe step by step movement of the conveyor. This looper carriage 36 ismoved back and forth by means of a tension springl 38 tending to `pullin one direction and a cam 39 mounted on the .drive shaft 24, which camengages the roller follower 40 on the loo er carriage to move it againstthe action o the spring 38.

The looper or shuttle 37 shown in Figs. 8 and 9 is rotatably mounted ina circular seat or depression'4` in the looper carriage. The loopercarriage' in its reciprocating movement moves the looper or shuttle intoor out of driven relationship with respect to the vertical shuttle driveshaft 42. In order to hold theshuttle in place in the circulardepression 41, a light leaf spring 43 is provided which engages theupper portion of the shuttle and holds it in place when it is out @ofdriven relationship with respect to the drive shaft 42.

The successive stages of the operation of the looper or shuttle areshown in Figs. 11, 12, 13 and 14. In Fig. 1l the looper carriage hasbeen shifted so that the axls of the shuttle is in alinement with theneck of the bag, 'the looper carriage being provided with a pair ofrollers 44 which straddlec'the slide 17 which carries the bag and,snugly engage the edges therof to insure proper alinement of theshuttle with respect to the neck fof the bag. The shuttle drive shaftv42 is intermittently driven as Will be eX- plained in detailhereinafter, and begins to rotate the shuttle after the shuttle hasaligned itself With the neck of the bag. In Fig. 12 the shuttle hasrotated somewhat from the position shown in Fig. 11 and is justbeginning to pick up the thread 45 from the needle, the thread beingreceived inthe notch 46 formed in the point of the 'loopen Fig. 13 showsthe shuttle rotated still further r,and shows the 'looper beginning toWrap the cord about the neck of the bag at 47. Fig. 14 shows the looperabout tocompletethe looping operation, the cord being'wound aboutone-half way around the the drive shaft.'

lar is provided with a notch or depression shuttle and the drive shaftat this point in the operation by means of the loop tightening arm 34 onthe needle carriageA which is operated at this vpoint to act on the cordbetween the intermittently acting cord grip 14 and the needle, asdescribed in detail hereinafter.

-The drive shaft 42 for the shuttle drives the shuttle by means-of asleeve or collar 49, splined to the shaft and having a'driving lug orprojection 50 which engages a corresponding driving lug orprojeetion 51von the shuttle. I'lhe drive collar 49 is held in accuratedrivingrelation with respect to the shuttle during the rotating movement of theshuttle by means of a fixed pin 52, which engages the upper shoulder ofthis driving collar and prevents its rising up on However, the drivecol- 52a at the proper point, which comes opposite the fixed pin 52after the shuttle has nished its rotating movement and this notchpermits the drive collar to'yield up- Wardly to permity that partof thecord 45 which lies above the shuttle to slip easily between the upperface of the shuttle and the lower end of the drive shaft and drivecollar. This vertical shuttle drive shaft is intermittently driven fromthe drive shaft i same shaft as the spiral gear, a pinion 56intermittently driven from this mutilated gear 55, a shaft 57 on whichthis pinion is mounted, a bevel gear 58 mounted on thi` shaft 57 and abevel gear 59 meshing with this bevel gear 58 and mounted on thevertical shuttle drive shaft 42.

The loop take-up arm 34 is pivotally mounted on the needle carriage bymeans of a pivot pin 60 and is controlled in its ocillating movement bymeans ot' a tension spring 61 urging it in one direction and a rocklever 62 which controls the spring actuated movement of the loop take-uplever. This rock lever 62 is pivoted on a fixed support 63 by means of apivot screw (34 and is actuated by the movement of the `needle carriageA20. When the needle carneedle carriage passes the shoulder 65 on therock lever. This permits the tension v spring 61 to move the looptake-uplever 34 to the position shown `in Fig. 1. When vthe needlecarriage starts to move to the left from the position shown in Fig. 1,the lefthand end of the rock lever 62 is at once forced upwardly,causing the right-hand end to move downwardly andl quickly move the loop,take-up lever 34back to the position shown in Fig. 10, which causes theportion of the cordwhich lies above the shuttle to be drawn over the topof the shuttle between the shuttle and its drive shaft and then drawsthe loop up about the neck of the bag. yThe intermittent cord gripdevice 14 is caused to grip the cord, at the time the loop take-upoperates, by means of an arm 66 mounted on the needle carriage 20 havinga cam portion 67 which engages the side of gripping device 14 and forcesthe gripping disk 68 over toward the gripping disk 69 to cause the cordto be securely held between these grips. a

The gripping disk 68 is mounted on a yieldable arm 69, the tension inwhich is such as to normally permit the plate to be readily drawnbetween the clampingdisks 68 and 69. However, when the arm 66 movesforwardly thev cam portion '67 engages the side of the yieldable arm 69aand forces the gripping disk 68 toward the gripping disk 69 to hold thecord at this time.

In/order to provide av support or backing for the neck of the bag at thetime the needle is forcing the cord therethrough, an intermittentlyoperated lever 7 O is provided having a foot portion 71 which is broughtup against the neck of the bag at just the right time to support it Whenthe needle is forcing its Way through the bag. This rock lever ispivoted vat 72 on a bracket 73 controlled in its movement by a coiltension spring 74 urging itin one direction and a cam 7 5 mounted on arotatable shaft 76, which, at the proper time, operates the leveragainst the action of this spring.

In operation, the conveyor is operated at intervals to bring the bagssuccessively past the bag tying mechanism. The conveyor is brought to astop with one of the bag carrying guide members 17 just opposite theneedle carriage 2() and the loop placing mechanism 13.

36 is then reciprocated to bring the axis of the shuttle 37 directlyunderneath the axis of the shuttle drive shaft 42, the rollers 44serving to accurately position the looper carriage with respect to thebag carrying device 11. The intermittently rotatable shaft 42 thenlcauses a revolution of the shuttle 37, causing the point of the shuttleto catch the loop of thread from the needle 12 and place it around theneck of the bag. The needle carriage 20 is then Withdrawn, the firsthalf of the Withdrawal causing the loop take-up arm 34 to act to drawthe loop up about the neck of the bag.

The intermittent cord grip 14 holds the arm acts, to prevent the cordfrom feeding Y at this time.

In the claims Where theI expression axis of' the bag is used, it is, tobe understood as meaning the longitudinal axis extending from top tobottom of the bag.

I claim:

1.. A bag tying machine for tying a bag having a gathered neck, the axisof which extends longitudinally of the bag comprising means for forcinga loop of corl through the gathers at the neck of the bag, and means foropening the loop and for placing the loop over the ends of the gathersand causing it to substantially completely encircle the neck of the bagand drawing the loop up about the neck.

2. A bag tying machine for tying a bag having a gathered neck, the axisof which extends longitudinally of the bag comprising a needle forforcing a loop of cord through the gathers at the neck of the bag, andmeans for opening the loop and for placing the loop over the ends of thegathers and causing it to substantially completely encircle the neckofthe bag and drawing the loop up about the neck.

3. A bag tying machine for tying a bag having a gathered neck, the axisot' which extends longitudinally of the bag comprising means for forcingya loop' of cord through the gathers at the neck of the bag, and rotarymeans for opening the loop and for placing the loop over the ends of thegathers and causing it to substantially completely' encircle the neck ofthe bag and drawing the loop up about the neck.

4. 'A bag tying machine for tying as bag having a gathered neck, theaxis of which extends longitudinally of the bag comprising a needle for`forcing a loop of cord through the gathers at the neck of the bag androtary means for opening the loop and for placing the loop over/ theends of the gathers and causing it to substantiallycon` pletely encirclethe neck of the bag.

5. bag tying machine for tying a bag having a gathered neck, the axis4of which extends longitudinally of the bag comprising a conveyorprovided with a series of bag1 carrying and neck gathering devices and abag tying mechanism past which the bags are carried, comprising a needlewhich -for placing the loop over the ends ofthe gathersand causing it tosubstantially completely encircle the neck of the bag.

6. A bag tying machine for tying a bag having a gathered neck, the axisof which extends longitudinally of the bag comprising means forgathering the bag at the neck, a needle which perforates the gathers ofthebag and passes a loop of cord therethrough, and rot-ary means foropening thc loop and for placing the loop over the ends of the gathersand causing it to substantially completely encircle the neck of the 7.A; bag tying machine for tying a bag having a gathered neck, the axisoi' which extends longitudinally of the `bag comprising a conveyorprovided with a series ofi bag carrying devices, a needle for passing Saloop oir' cord through the neck of the bag, and rotary meansl foropening the loop and :tor placing the loop over the ends oi' the gathersand causing it to substantlally com-'- pletely encircle the neck of thebag.

8. A'bag tying machine `for tying a bag having a gathered neck, the axisof Which extends longitudinally of the bag comprising means' for passinga loop o cord through the gathers oi the neck of `the bag andintermittently rotatable means for opening the loop and for placing'theloop over the ends or' the gathers and causing it to substantiallycompletely -encircle the neck of the bag.

9. A bag tying machine for tying a bag havin(r a gathered neck, the axisof, which extends longitudinally o the bag compris` ing anlintermittently movable conveyor provided with a -series of bag carryingand neck. gathering devices and a bag tying mechanism past which thebags are carried `comprising a needle Vwhich perforates the gathers andforces a loop of cord therethrough during the stationary condition ofthe conveyor and an intermittently reciprocable loop placing mechanismcom rising an .intermittently rotatable looper, said loop placingmechanism being reciprocable to bring the axis of the looper in linewith the axis ofthe neck of the bag during the stationary condition ofthe conveyor and to move the loop placing mechanism out of the way ofthe conveyor during the intermittent movement of the conveyor.

l0. A bag tying machine for tying a bag having a gathered neck, the axisof which extends longitudinally of the bag comprising an intermittentlymovable conveyor provided with a series ofybag carrying and neckgathering devices and a bag tying mechanism past which the bags arecarried comprising a needle which perforates the gathers and forces aloop oi? cord therethrough during the stationary condition oi"- theconveyor and an. intermittently reciprocable loop placingfmechanismcomprising an,intermittently rotatable looper, said loop `placingmechanism being reciprocablc to ring the axis of the looper in line withthe axis of thel neck of the bag during the stationary conditiono'f theconveyor and to move thev loop placing mechanism out of the Way of theconveyor during theintermittent movement of the conveyor, and means fordrawing the. loop up about the neck of the bag. c 4

11. A bag tymg machine for tying a ba having a gathered neck, the axisof whic extends longitudinally of the bag ycomprism provi ed with aseries of bag carrying and neck gathering devices and a' bag tyingmechanism past which the bags are carried comprising a needle whichperiorates the gathers and forces 'a loop of cord therethrough duringthe stationary condition of the conveyor and an intermittentlyreciprocable loop placing mechanism comprising. an intermittentlyrotatable looper, said loop placing mechanism being reciprocable to ringthe axis of the looper in line with the axis of the neck of? the bagduring the stationary condition oi the conveyor and. to move the loopplacing mechanism out of the Way of the conveyor during the intermittentmovement of the conveyor, means for gripping thev thread beingied to theneedle, and means acting on the thread between the ipping means .andneedle for drawing the oop u about the neck of the bag. A l 12. bagtying machine for tying a bag havin a gathered neck, the axis o whichexten s longitudinally of the bag comprising an intermittently movableconveyor provided with a series of bag carrying and neck gatheringdevices land a bag tying mechanism past which the bags are carriedcomprising -a needle which perforates the gathers and' forces a loop ofcord therethrough during the stationary condition of the conveyor and anintermittently reciprocable loop placing mechanism comprising anintermittently rotatable looper, said loop Aplacing mechanism beingreciprocable to bring the axis of the looper. in line with the axis ofthe 'neck ofl the bag during the stationary condition of the conveyor anintermittently movable conveyor bill lil@

and to move the loop placing mechanism thread betvveen the grippingmeans and J needle for drawing the loop up about the neck of the bag.

13. A bag tying machine for tying a bag having a gathered neck, the axisof which extends longitudinally of the bag, comprising a conveyorprovided with a series of bag carrying and neck gathering devices and abag tying mechanism past which the bags are carrie comprising a needlewhich perforates the gathers at the neck of the bag and passes a loop ofcord therethrough, and rotary means for opening the loop and for placingthe loop over the ends ot' the gathers and causing it to substantiallycompletely encircle the neck of the bag, said rotary meansv beingcoaxial with the bag o-perated on.

14. A bag closing machine comprising an intermittently movable bagcarrying conveyor for carrying the bags in a direction transverse totheir axes, means for gathering each bag to form a neck extendinglongitudinal of the axis of the bag, and a bag tying mechanism pastwhich the bags arel carried comprising a needle which perforates thegathers at the neck of the bag and passes a loop of cord therethrough,and rotary means for opening the loop and for placing the loop over theends of the gathers and causing it to substantially completely encirclethe neck of the bag.

15. A bag closing machine comprising a bag carrying conveyor, a seriesof neck gathering devices mounted on said conveyor and a bag securingdevice past which the bags are successively carried by the conveyor,each neck gathering device comprising a guide extending transversely ofthel line of movement of the conveyor, and a pair of jaws mounted ineach of said guides to slide transversely of the line of movement of theconveyor.

16. A bag closing machine comprising a bag carrying conveyor, a seriesof neck gathering devices mounted on said conveyor and a bag securingdevice past which the bags are successively carried by the conveyor,each neck gathering device co1nprising a guide extending transversely ofthe line of movement of the conveyor, and a pair of jaws mounted in eachof said guides to slide transversely of the line of movement of theconveyor, each jaw having a converging neck engaging portion, the converging portion of one jaw overlapping the converging portion of theother jaw as the jaws approach each other, whereby the neck of the bagis squeezed Atogether by the converging portions of both jaws.

In witness whereof, I have hereunto subscribed my name. y

JULIUS H. WALD.'

